For what it is worth, my 2001 F450 and 2006 F350 C&C extended WB had the same number of 10 leaves in suspension.
My conclusion was that C&C are build for work, while bedded F350 dualies are still build for grocery getters.
Not that I can have much complains about my 2017 F350 dualy.
Just come back from vacations. (is going camping on retirement still consider vacations?)
About 6000 lb of camper,
3500 lb boat (patio boat with aerodynamics of open shoe-box)
48" stinger and high load on tongue.
When I did not like the tongue scratching driveways, the truck did not mind at all. Driving over 7000' elevation, high winds and no issues.
Averaging about 10 mpg with almost 18,000 lb combo in those hard conditions. CC set at 60.
Heck - friend was driving Toyota Camry behind us and she had to fill up sooner than I did.